ARM: OMAP1: ams-delta: remove unused function ams_delta_camera_power

The ams_delta_camera_power() function is unused as reports
Clang compilation with omap1_defconfig on linux-next:

arch/arm/mach-omap1/board-ams-delta.c:462:12: warning: unused function 'ams_delta_camera_power' [-Wunused-function]
static int ams_delta_camera_power(struct device *dev, int power)
           ^
1 warning generated.

The soc_camera support was dropped without removing
ams_delta_camera_power() function, making it unused.

Fixes: ce548396

 ("media: mach-omap1: board-ams-delta.c: remove soc_camera dependencies")
Signed-off-by: Maciej Falkowski <maciej.falkowski9@gmail.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://github.com/ClangBuiltLinux/linux/issues/1326